Double-cylinder double-acting pump



Jan. 24, 1928.

IN V EN TOR.

A TTORN E Y.

1,657,378 L. A. DoURsoN DOUBLE CYLINDER DOUBLE ACTING PUMP Filed March51, 1927 s sheets-sheet' 2 A TTORNE Y.

Jan. 24, 1928.

L. A. DOURSON DOUBLE CYLINDER DOUBLE ACTING PUMP 3 Sheets-Sheet FiledMarch 31, 1927 INI/ENTo/e a awa. @W ATTOR Patented Jen. 24, 1928.

tesis-78 UNITED STATES PATENT OFFICE.

LOUIS A. DOURSON, 0F CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN OIL PUMP&

TANK CO., 0F CINCINNATI, OHIO, A CORPORATION OF OHIO.

DOUBLE-CYLINDER DOUBLE-ACTING PUMP.

Application filed March 31, 1927. Serial No. 179,503.

My invention relates to double acting, double cylinder, reciprocatingpiston pumps. Such pumps are well adapted for use in 'visible dispensingapparatus for gasoline, in pumping the gasoline from the undergroundstorage tanl to the glass bowl at the top. Their compactnes's permitstheir being mounted in the housing ofsuch apparatus. @ne object ot myinvention is to provide a highly concentrated, inexpensive pump of thecontinuous flow type the `operation of which will not be interfered withby .small particles of grit and sediment.

Another objcctot my invention is to provide an apparatus that can beused to pump liquid continuously by continuous rotation of the crank ineither direction, at the option of the user. A left handed person canuse it with the same facility as a righthanded person.

.Another object is to provide a pump that is easilyv assembled and willhave all necessary accessibility for cleaning'the valves or for makingother repairs.

Another object of this invention is to have all working parts protectedfrom the weather by the casing and run in the liquid pumped, renderingotherprovision for lubrication unnecessary.

The particular embodiment of my invention selected for illustration, isa `gasoline pump shown in the accompanying drawings, in which Figure l,is a longitudinal section on the axis ot the crank shaft and on the linel-l ot 2 as thoughshown there in full,

Fig. 2, is a cross section on the line 2-2 otFigure 1,

lig. 3, is a cross section on the line `3--3 ot` Figure l,

Fig. 4t, is a cross section on the line 4-4 of Fig. 6, the body castingsonly being shown. y y

Fig. 5, is a cross section on the line 5 5 et 6. the body castings onlybeing shown, y

Fig. 6, is an elevation of the pump on the side opposite the crank, and

7, is a perspective ot one of the two similar machined castings formingthe pump body, looking toward the side which is joined to the othercasting.

Referring now to the drawings, the pump body is made up ot two generallysimilar' castings A and B. Casting A carries a connection c for thesuction pipe (not sho-wn) and a connection 0:1 for the discharge pipe(not shown), and has a plugged opening a2 thru which Water and sedimentmay be drained from the bottom of the body. lVithin the outer side ofthe casting A is formed a cylindrical. chamber i3 preferably lined witha thin brass tube at. The inner side oit' the casting A is generallyfiat in shape having an encircling raised portion a5. It also has acentral rib al which extends lengthwise centrallyof this flat portionand at its ends unites with the opposite sides of n the encirclingraised portion o5. Raisedv portions a5 and a7 have their seatingsurfaces in the same plane and a cutout gasket g1 of the same generalform as said seating surfaces a5 and o7 is seated upon them. Bosses ason the surface oit the outer side oi the casting A are tapped to receivecap screws (not shown), bywhich the pump is secured to the housing, (notshown) in which it is placed.

Generally co-axial with the cylinder a3 at the top oiE the casting A is'an opening ai 30 for purposes ot assembly, which opening is tapped andclosed by a screw plug alo. The bottom cylinder head is formed of acasting a secured to the casting A with gasket g between` by cap screwsal* or in any other convenient manner; and carries a guiding portion(i12 (1o-axial with tho cylinder and bored to receive a dependingprolongation p ot the piston P. A screw plug 613 is usedk to close thebottom of the guide om, and may 90 be removed ttor drainage.

The piston P is of any suitable double acting type, and the connectingrod p1 has `a cap p2 secured in position by cap screws p3 in the usualmanner.

On the inner side of the cast-ing A are two longitudinal depressions@15, @16, one on either side ot the rib a7. Near the bottom form ofmechanism shown and described but claim as within the scope of myinvent-ion all devices readable on the claims finally all. A doubleacting two cylinder' reciproi eating piston pump, haring in combinationtwo parts each containing a cylinder, means for securing said parts toeach other to form a pump body, channels in the so attached side of eachsaid part so that when said parts are united a suction chamber and adischarge chamber will be formed by said channels, a fluid passageconnecting each cylinder at each of its ends with the suction chamber, avalve in each of said passages opening away from the suction chamber, afluid passage connecting each cylinder at each of its ends with thedischarge chamber, a valve in each of said passages opening toward thedischarge chamber, a suction inlet connected with said suction chamberand a discharge outlet connected with said discharge chamber, a doubleacting piston for each cylinder and means for reciprocating saidpistons.

2. A double acting two cylinder reciprocating piston pump, having incombination two parts each containing a cylinder, means for si'curingsaid parts to each other to form a pump body, channels in the soattached side of each said part so that when said parts are united asuction chamber and a. discharge chamber will be formed by saidchannels, a fluid passage connectingr each cylinder at each of its endswith the suction chamber, a spring closed valve in each of said passagesopening away from the-suction chamber, a fluid passage connecting eachcylinder at each of its ends with the discharge chamber, a spring closedvalve in each of said passages opening toward the discharge chamber, afluid passage connecting the eX- terior of the pump with the suctioncham ber, a fluid passage connecting the discharge chamber with theexterior of the pump, a double acting piston for each cylinder, aconnecting rod for each piston and unitary means for reciprocating saidpiston thru said connecting rods.

3. A double acting two cylinder' reciproeating pistoir` pump, having incombination two castings of generally sen'iicylindrical shape eachcontaining a cylinder, means for securing the flat sides of saidcastings to each other to form a pump body, the flat side of eachcasting channelled so that when unit-ed said castings will form asuction chamber and a discharge chamber, a fluid passage connecting eachcylinder at each of' its ends with the suction chamber, a valve in eachof said passages opening away from 'the suction chamber, a fluid passageconnecting each cylinder at each of its ends with the discharge chamber,a valve in each of said pas-ages opening'toward the discharge chamber, asuction inlet connected with said suction chamber and a discharge outletconnected with said discharge chamber, a double acting piston for eachcylinder and means for. reciprocating said pistons.

A'la A double acting two cylinder recipro-y eating piston pump, havingin combination two' castings ot generally `scmicylindrical shape eachcontaining a cylinder, means for securing the flat sides of saidcastings to each other to form a pump body, the flat side of eachcasting channelled so that when united said castings will form a suctionchamber and a discharge chamber, a fluid passage connect-ing eachcylinder at each of its ends with the suction chamber, a spring closedValve in each of said passages opening away from the suction chamber, afluid passage connecting each cylinder at each of its ends with thedischarge chamber, a spring closed valve in each of said passages opening toward the discharge chamber, a fluid passage connecting theexterior of the pump with the suction chamber, aA fluid passageconnecting the discharge chamber with the exterior of the pump, a doubleacting piston for each cylinder, a connecting rod for each piston andunitary means for reciprocating said pistons, thru said connecting rods.

5. A double acting two cylinder reciprocat-ing piston pump, having incombination two castings of generally semicylindrical shape eachcontaining a cylinder, means for securing the flat sides of saidcast-ings to each other to form a pump body, the flat side of eachcasting channelled sothat when united said castings will form a suctionchamber and a discharge chamber, a fluid passage connect-ing `eachcylinder at each of its ends with the suction chamber, a valve in eachof said passages opening away from the suction chamber, a fluid passageconnecting each cylinder at each oi its ends with the discharge chamber,a valve in each of said passages opening toward the discharge chamber, asuction inlet connected with said suction chamber' and a dischargeoutlet connected with said dischargechamber, a double acting piston foreach cylinder', means for guiding said pistons and means forreciprocating said pistons.

6. A double acting two cylinder reciprocating piston pump, having incombination two castings of' generally semicylindrical shapeeachcontaining` a cylinder, means for securing the flat sides of saidcastings to each other to form a pump body, the flat side of eachcasting channelled so that when united said castings will yform asuction chamber and a discharge chamber, a fluid passage connecting eachcylinder at each of its ends with the suction chamber, a valve in eachof said passages opening away from `the suction chamber, :i Huid passageeen meeting web cylinder at euch e'i its ends with the dischargechamber, :i valve in each el seid passages opening toward the disehargechamber, n` suction inlet connected with said suction chmnbei.' und adischarge outlet Connected with said discharge chambei', n` doubleacting' piston 'for each cylinder, a` crank shaft mede el e plurality elparte s0 that each of the castings may have the pumping mechanismassembled therein com plete belote the two euetings :1re eeellli'ei'ltogether, and menus 011 the eenligueus emlel el Saul Ci'mlk shaft;sections when so essere bled for so interlocking; said seetonstliut 15when the easiiuge are bolted together both sections el: the 011ml; elmt;will rotule t0- getliei'.

lli testimony whereof l- 11:1 ve hereunto sei my lmnil.

LOUIS A. DOURSUN.

